Drilling apparatus



July 12, 1932- M. P. HoLMl-:s

DRILLING APPARATUS Filed July 2v. 192e 4 Sheetsf-Sheet 1 4 Sheets-Sheet 2 July l2, 1932. M. P. HOLMES DRILLING APPARATUS Filed July 27. 1928 www N mi yh'O l Q July 12, 1932. M. P. HOLMES 1,866,932

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Patented July 12, 1932 UNITED STATES PATENT OFFICE MORRIS P. HOLMES, F CLAREMONT, NEW HAMPSHIRE, ASSIGNOB T0 SULLIVAN MACHINERY COMPANY, A CORPORATION 0F MASSACHUSETTS DRILLING APPARATUS Application led July 27, 1928. Serial No. 295,786.

. ter may be positioned relative to the work with facility and expeditiously. Yet another object is to provide an improved coal drill especially adapted to use in drilling shot holes in the working face of the coal. A further object is to provide an improved selfpropelled wheeled support and improved adjustable sup orting means for a drilling tool together wit improved driving connections therefor whereby an exceedingly compact and .easily adjustable drilling apparatus is obtained. These and other objects of the invention will subsequently more fully appear.

In the accompanying drawings there is shown for purposes of illustration one form which the invention may assume in practice.

In these drawings, Fig. 1 is a side elevational view of the imroved drillin apparatus, the drilling tool lieing shown adjusted into a plurality of positions.

Fig. 2 is an end elevational view of the drilling apparatus shown in Fig. 1 with the drilling tool omitted to facilitate illustration.

Fig. 3 is a plan view of the drilling apparatus shown in Fig. 1, the drilling tool being adjusted into a plurality of positions.

Fig. 4 is a fragmentary sectional view taken substantially on line 4 4 of Fig. 3.

Fig. 5 is a transverse vertical sectional view partially in elevation taken substantially on line 5 5 of Fig. 1.

Fig. 6 is a detail sectional view taken on line 6 6 of Fig. 5.

Fig. 7 is a central longitudinally extending vertical sectional view taken substantially on line 7 7 of Fig. 3 and illustratin details of construction of the drilling too per Fig. 8 is a horizontal sectional view taken on line 8 8 of Fig. 5 and illustrating details of construction of the cable reel.

Fig. 9 is a transverse vertical sectional view taken on line 9 9 of Fig. 8.

In this illustrative construction there is shown a drilling apparatus generally comprising a drilling tool generally designated 1 supported on a self-propelled Wheeled truck 2 by means of improved adjustable supporting means genera ly designated 3. As illustrated, the wheeled truck 2 comprises a truck frame 4 having side frame members 5 connected together at their ends by transverse bearing members 6 in which the front and rear truck axles 7 and 8 are respectively journaled. Fixed to these axles 7 and 8 are the usual truck wheels 9 adapted to run along a usual mine trackwa 10. As shown the bearing members 6 of t e truck frame each have formed integral therewith a combined bumper and coupling member 11 by means of which the truck may be connected to a locomotive to permit the drilling apparatus to be moved about the mine independently of its own power. Now referring to the improved adjustable supporting means it will be observed that the side frame members 5 of the truck have formed thereon, intermediate the wheel axles, bearing members 12 carrying usual bearing sleeves 13 (see Fig. 5). Rotatably mounted in the bearing sleeves 13 for tilting movement about a transverse horizontal axis is a housing or casing 14 having lateral trunnions 15 projecting within the bearing sleeves and forming bearings for the casing on the truck. The mechanism for tilting or rocking the casing 14 within its bearings relative to the truck frame will hereinafter bedescribed. Rotatablymountedonthecasing 14 about an axis perpendicular to the axis of tilting movement thereof is an upstanding tubular column or standard 16. Fixed to the column 16 at its upper end as by screws 17 is a housing or casing 18. The housing 18, as shown in Fig. 4, has formed integral therewith a rearwardly rejecting su port or arm 19 which has rigidly secured t creto at its extreme rearward end, as by screws 20, a motor 21. In this instance, arranged in axial alinement with the motor and rotatably mounted on the frame 18 is a forwardly projecting boom or tubular supporting arm 22 which carries at its extreme outer end the drilling tool 1. The drillingl tool 1 may be of the same general type as t at described in my copending applications, Ser. N o, 200,826, filed June 23, 1927 and Ser. No. 255,754, filed Feb. 20, 1928, and a copending a plication of one Richard E. Murphy, Ser. o. 274,821, filed May 3, 1928, now matured into Patent No. 1 848,376, patented March 8, 1932.

Re erring more particularly to the driving connections between the motor and the drilling tool 1 it will be observed from Fig. 4 that the armature shaft 23 of the motor 21, which herein may be of the reversible electric type is journaled at its forward end in ball bearings 24 suitably carried within the front motor head. This armature shaft 23 has fixed thereto by a key 25 a coupling member 26 having internal keys 27 cooperating with keyways 28 formed on the periphery of a shaft 29 alined with the motor shaft and journaled in ball bearings 30 suitably supported within the housing or casing 18. The shaft 29 has xed thereto by a key 31 a bevel pinion 32 which meshes with a bevel gear 33, supported in a manner to be later described, which in turn meshes with a bevel pinion 34 fixed at 35 to a shaft 36 arranged in axial alinement with the motor shaft. The shaft 36 is herein the main driving shaft for the drilling tool 1 and, as shown in Figs. 4 and 7, is journaled at its opposite ends in ball bearings 37 and 38, the ball bearing 37 being supported within the rear end of the adjustable tubular supporting arm or boom 22, while the bearing 38 is supported by a frame or swivel bearing bracket 39 secured to the outer end of the arm 22 as by screws 40. The drilling tool 1 is swiveled on the bearing bracket 39 as will later be described. In this instance the tubular supporting arm 22 surrounds the shaft 36 and is journaled at its rear end for rotation about its longitudinal axis in spaced alined ball bearings 41 and 42 suitably carried by the housing or casing 18. As shown in Fig. 7 the outer end of the main drive shaft 36 has fixed thereto at 43 a bevel pinion 44 meshing with a larger bevel ring gear 45. The bevel ring gear 45 is rotatable about an axis perpendicular to the axis of the driving shaft 36 and is journaled on a. ball bearing 46 suitably supported by a bearin bracket 47- and a swivel plate 48. The swive plate 48 is rigidly secured by screws 49 to the bearing bracket 47. The swivel plate 48 is herein rotatably mounted in a bore 50 arranged concentricall with the bevel gear 45 and formed within t e bracket 39 and is pro.

Lacasse vided with a peripheral oove 51 with which a clamp or set screw 52 1s ada ted to engage to .clam the swivel plate 48 1n its different ad]uste positions rigidly to the bracket 39. A s illustrated the bevel kring gear 45 meshes `with a bevel gear 53 fixed at 54 tc a shaft 55 1n a plane with main driving shaft 36. The shaft 55 is 'ournaled in ball bearings 56 carried by the earing bracket 47 Also fixed to the shaft 55 is a spur gear 57 while formed integral with the o posite end of the shaft 55 is a spur gear 58. T e gears 57 and 58 mesh respectively with spur gears 59 and 60, the spur gears 59 and 60 constituting the drlving elements for the tool rotating and feeding mechanism and which are adapted to effect rotation and feeding of a drill bit 61 through friction clutches 62 and 63 and a differential screw mechanism 64. As this specific feeding and rotation mechanism for the cutting bit 61 is clearly described in the copending applications mentioned above further description of the same is herein submitted to be unnecessary other than to state that the drill bit is adapted to be fed forwardly at a slow cutting speed and retracted at a relatively high speed while the same is continuously rapidly rotated. From the foregoing description it is evident that the drilling tool 1 may be swiveled on the outer end of the supporting arm 22 and rigidly locked in any of its ad]usted positions. The mechanism for eii'ecting rotation of the boom or tubular supporting arm 22 within its bearings 41 and 42 carried by the housin 18 herein comprises a worm gear 65 (see ig. 4) fixed by keys 66 to the supporting arm 22 intermediate the supporting bearings. As illustrated, meshing with the worm gear 65 is a Worm 67 having suitable operating handles 68 disposed at the opposite ends of the worm. This rotation mechanism for the supporting boom is clearly described in my copending application Ser. No. 255,754, mentioned above. It is accordingly evident that the supporting arm or boom; upon rotation of the worm gearing 67, 65 may be rotated about is longitudinal axis relative to the housing 18 and as a result the drilling tool 2 may be swung bodily about the axis of the supporting arm. As this worm gearing is of the self locking type the boom is rigidly locked against rotation aftersuch adjustment.

The driving connections between the motor and the truck wheels will now be described. As mentioned above the motor shaft drives the bevel pinion 32 which meshes with the bevel gear 33. This bevel gear is keyed at 69 to a vertical shaft 70 arranged concentrically with and extending through the upstanding column of standard 16 as clearl shown in Fig. 5. The opposite ends of t e shaft 70 are journaled in ball bearings 71 and 72 suitably supported within the housing 18 and a frame member 73 respectively. This frame 73 is fixed by screws 74 to the tiltable housing 14. As shown the frame member 73 has an upstandiiig sleeve portion 75` projecting u wardly through the column 16 and surroun ing the shaft 70.

The upstanding column or standard 16 is rotatably mounted on the sleeve portion 75 of the frame 73 about the axis of the shaft 70 on bearing sleeves 76 interposed between the standard 16 and the sleeve portion 75. Downivard axial thrust of the column 16 is received by a ball thrust bearing 77 inter osed bet Ween the lower surface of the bottom earing sleeve 76 and an annular shoulder formed on the frame 73, the ball thrust bearing 77 surrounding the sleeve portion 7 5 of the frame. Again referring to the driving connections between the motor and the truck Wheels it will be observed that the shaft 70 has keyed thereto at 78 a bevel pinion 79 which constantly meshes with reverse bevel gears 80 and 81. The bevel gears 80 and 81 are respectively connectible to a transverse horizontal shaft 82 by means of friction clutch devices 83 and 84 respectively. The shaft 82 is arranged coaxially with and extends through the supporting trunnions 15 for the tiltable frame 14 and is journaled in ball bearings 85 suitably supported within the casing 14. The friction clutch devices 83 and 84 have suitable shipper mechanism includingr a shipper member 86 slidable axially in opposite directions relative to the shaft 82 and includes a suitable operating lever 81'- pivotally mounted on the casing 14 (see Fig. 3). From the foregoing it is evident that when one or the other of the friction clutch devices 83 and 84 is applied the shaft 82 may be driven from the motor 21 in one direction or the other. Fixed by keys 88 to the opposite ends of the shaft 82 are chain sprockets 89 and 90. The sprocket 89 is connected by a chain and sprocket connection 91 with the front truck axle 7 while the sprocket is connected by a similar chain and sprocket connection 92 with the rear truck axle.

As pointed out above the tubular supporting column 16 is rotatably mounted about the axis of the shaft 70 and the means for holding this column in its different adjusted positions herein comprises a set screw 93 having a pivoted operating handle 94 and engaging a serrated clamping member 95. This clamping member is engageable with `the outer periphery of a drum herein formed integral with the supporting column 16 at its lower end. It will thus be seen that the supporting column 16 may be rotated about a substantially vertical axis relative to the truck frame and consequently the boom or supporting arm 22 together with the drilling tool 1 may be swung laterally in either direction relative to the truck frame and thereafter rigidly held in position by the clamp mechanism 93, 95. 96. It is therefore obvious that the drilling tool may be positioned at either rib or in any intermediate position across the coal face. The mechanism for rocking the tilting frame 14vabout its axis relative to the truck frame comprises a worm gear segment 97 rigidly fixed by screws 98 to the easing 14. eshing with this worm gear segment is a Worm 99 formed integral with a shaft 100 rotatably mounted in ball bearings 101 suitably carried by an upstanding housing member 102 herein formed integral with one of the side members 5 of the truck frame. The worm 99 is adapted to be rotated by means of anoperating handle 103. Inter osed between the worm 99 and tho hand e 103 is a releasable positive lock 104 comprising a toothed clutch member 105 fixed to the shaft 106 to Which'the handle 103 is secured, this shaft being slidably mounted at its inner end in a bore 107 formed within the shaft 100. The teeth of the clutch member 104 are engageable with teeth 108 formed on a plate 109 bolted to the stationary housing 102. The adjacent end of the shaft 100 has formed thereon clutch teeth 110 which at all times cooperate with the teeth of the clutch member 105. Interposed between the clutch member 105 and a cap member 111 and surrounding the shaft 106 is a coil spring 112 which normally maintains the teeth of the clutch member 105 in engagement with the locking teeth 108. It is accordingly evident that when the parts are in the position shown in Fig. 6 the worm shaft 100 is positively locked to the housing 102. When it is desired to rotate the worm the operator grasps the handle 103 and slides the shaft 106 011twardly against the tension of the coil spring thereby releasing the teeth of the clutch member 105 from the teeth 108. The teeth 110 on the shaft 100 are still in engagement With the teeth of the clutch member and therefore upon rotation of the shaft 106 the worm 99 is rotated swinging the worm gear 97 together with the tiltable housing 14, relative to the truck frame. As a result the sup orting column 16, the boom 22 and the drilling tool 1- may beV rocked about a transverse axis relat1v e to the truck frame, thereby enabling the drilling tool to be positioned adjacent the top or bottom of the working face or in any intermediate position.

Electric current is supplied to the motor 21 through a conductor cable 113 (see Fig. 8) having lead Wires 114 suitably connected to stationary contact rings 115 lixed to a cylindrical member 116. The member 116 is secured by screws 117 to a stationary frame 118 rigidly secured to the housing 18 carried at the top of the supporting column 16. Yieldably engaging the rings 115 are contact members 119 connected to the lead wires 120 of a conductor cable 121 wound upon a rotatable cable reel or drum 122. The drum 122 is journaled on roller bearings 123 suitably supported by the frame 118. As illustrated the cable reel 122 is driven from the motor through the bevel pinion 32 and bevel gear 33 heretofore described. Meshing with the bevel gear 33 is a bevel gear 124 (see Fi 5 and 8) fixed by a key 125 to a horizontal s aft 126 arran ed coaxially within the reel. This shaft 126 1s journaled at its opposite ends in ball bearings 127 suitably supported b the frame 118. Herein formed integral witli the outer end of the shaft 126 is a spur pinion 128 which meshes with planetary gears 129 rotatabl mounted at 130 on a rotatable plate 131. 'l`he planetary gears 129 mesh with the teeth of a stationary internal gear 132 fixed by screws 133 to the frame 118, this internal ear forming a support for one of the roller earings 123 upon which the cable reel is rotata 1y mounted. The plate 131 carries friction discs or plates 134 disposed ou opposite sides of a friction disc or plate 135 suitabl fixed t0 a member 136 bolted to the cable ree Engaging the outer friction disc 134 is a plate 137. The friction plates 134, 135 are normally held in frictional engagement by means of bolts 139 and coil springs 140 which yieldably force the plates 131 and 137 together. The plate 137 is adapted to be moved outwardly to release the friction clutch 134, 135 by means of a hand wheel 141 threadedly connected at 142 to the plate 137 and having its threaded portion abutting the outer surface of the plate 131. It will be obvious that when the hand wheel 141 is rotated the plates 131 and 137 are forced apart thereby releasing the frictional engagement of the plates 134, 135 and as a result the cable reel is disconnected from its driving connection. A usual controller box 143 is provided for controlling the motor 21. This controller box is supported on a projecting bracket 144 herein formed integral with the supporting column 16 and is braced at its upper end by a stra member 145 extendin between the control er box casing and a etachable cap or plate 146 forming a part of the housing 18.

A braking device is provided for holding the truck wheels against rotation and herein comprises a brake drum 147 secured to the rear truck axle 8 and with which a contractible brake band 148 cooperates. The brake band 148 is provided with suitable operating means including a lever 149 pivotally mounted on the truck frame 4. A toothed segment 150 and latch 151 are employed for maintaining the lever 149 in its different adjusted positions. This brake is used to hold the truck wheels stationary during the drilling operation and to prevent too rapid movement of the apparatus when moving along an inclined trackway.

In the operation of the improved drilling tool the apparatus is propelled under its own power along the mine trackway by the motor 21 through the driving connections between the motor.` and the truck wheels as described above. As the drilling apparatus moves forwardly alon the trackway the cable reel 122 pa s out t e conductor cable 121 and when t e apparatus moves rearwardly the conductor cable 121 is automaticall wound in by the cable reel. The cable reelmay bc disconnected from the motor at will simply by releasing the frictional engagement of the c utch plates 134, 135. When the drilling apparatus reaches the Working face the operator applies the brake 147 holding the truck Wheels against rotation thereby maintaining the truck stationary. If it is desired to operate the drill at one side of the trackway or the other the operator releases the clamp 95 and swings the supporting column 16 about its axis relative to the truck frame thereby moving the supporting aim 22 and the drilling tool 1 to one side or the other of the longitudinal axis of the ap aratus, for instance, from the full line position shown in Fig. 3 to the dotted line osition. If it is desired to swing the drilling tool upwardly or downwardly the operator releases the lock 105, 108 and rotates the worm 99 thereby swinging the worm gear segment 97 together with the tiltable housing 14 about a transverse horizontal axis relative to the truck frame, for instance, from the full line osition shown in Fig. 1 to the dotted line position. The worm 99 is thereafter locked against rotation by means of the positive lock 105, 108. The drilling tool may be swung bodily about the axis of the supporting arm or boom 22 by means of the worm gearing 65, 67. When desired the angle of the drilling tool relative to the supporting arm 22 may be changed simply by releasing the clamping screw 52 and swinging the drilling tool bodily relative to the swivel bracket 39. It will be noted that the truck wheels, drilling tool, and cable reel may be driven irrespective of the position of the motor 21 relative to the truck frame. It will further be noted that the motor 21 is so positioned on the frame 18 as to substantially counterbalance the weight of the drilling tool carried on the outer end of the boom and therefore due to such a counterbalanced arrangement of the tool it is possible to swing the same in a vertical plane with facility. When the drilling tool 1 is suitably positioned adjacent the working face the clutches 62 and 63. may be so controlled as to eect feedin movement of the drill bit 61 and after t e hole is completed the drill bit may be retracted from the face at a high speed all in the manner clearly described in the above mentioned copending applications.

As a result of this invention an improved self-propelled drilling apparatus is provided whereby the drilling tool may assume a plurality of ositions relative to the working face and bv employing the improved su ortiiig andv adjustiii means for the tool t e atter may be moved into such positions with facility and expeditiously. Furthermore it will be noted that by arranging the motor in the manner described the ap aratus is rendered extremely well balanc the weight of the motor counterbalancing the weight of the drilling tool. These and other uses and advantages of this invention will be clearly apparent to those skilled in this art.

While I have in this ap lication specifically described oue form w ich the invention may assume in practice, it will be understood that this form of the same is shown for purposes of illustration and that the. invention may be modified and embodled 1n varlous other forms without departin from its spirit or the scope of the appende claims.

What I claim as new and desire to secure by Letters Patent is'.

l. In a drilling apparatus, a wheeled support, an upright standard wholly sup orted thereby and tiltable relative thereto a out a horizontal axis extending transversely of said support adjacent the bottom of said standard, a boom adjustably mounted at its rear end on and solely supported by said standard and rigidly held against swinging movement relative tl1ereto,sa,1dboom extending forwardly 1n advance of said support substantiall lengthwise of the apparatus, devices on sai support and standard for swinging the latter about said axis and for holding the same in its different tilted positions, and a drilling tool carried by said boom at the forward extremity thereof.

2. In a drilling apparatus, a wheeled support, a frame mounted thereon and wholly supported thereby and tiltable relative thereto about a horizontal axis extending transversely of said support, a standard mounted on said frame for rotation about its longitudinal axis, a boom supported at its rear end on said standard and extendin forwardly in advance of said support su stantially lengthwise of the apparatus, and a drilling tool carried by said boom at the forward extremity thereof.

3. In a drilling apparatus, a wheeled support, a standard Wholly supported thereby and mounted thereon for tilting movement about a horizontal axis extending transversely of said support and for rotation about its longitudinal axis, a boom supported at its rear end by said standard and extending forwardly in advance of said support substantially lengthwise of the apparatus, and a. drilling tool carried by said boom at the forward extremity thereof.

4. In a drilling apparatus, a wheeled support, a standard mounted thereon for tilting movement relative thereto about a horizontal axis extending transversely of said support, a frame supported by said standard and rigidly held against swinging movement relative thereto, a motor carried by said frame, a boom mounted at its rear end on said frame and solely supported by said frame and standard, said oom extending forwardly in advance of said support substantially lengthwise of the apparatus, a drilling tool carried by said boom 'at the forward extremity thereof, devices on said su port and standard for swinging the latter a out said axis and for holding the same in its different tilted positions, and driving connections between said motor and said drilling tool.

5. In a drilling apparatus, a wheeled support, a frame wholly supported by and pivotally mounted on said support to rock relative thereto on a transverse axis, a standard supported at its lower end on said tiltable frame for rotation relative thereto about an axis erpendicular to said first mentioned axis, a oom rotatably mounted on the upper end of said standard, and a drilling tool carried by said boom.

6. In a drilling apparatus, a wheeled support, a frame wholly supported by and pivotally mounted on said support to rock relative thereto on a transverse axis, a standard supported at its lower end on said tiltable frame for rotation relative thereto about an axis perpendicular to said first mentioned axis, a boom rotatably mounted on the upper end of said standard for rotation relative thereto about its longitudinal axis, and a drilling tool carried by said boom.

7. In a drilling apparatus, a wheeled support, a housing Wholly supported by and pivotally mounted on said sup ort for tiltlng movement relative thereto a out a transverse axis, a standard rotatably mounted on said housing, a boom supported at its rear end by said standard and extending forwardly in advance of said support substantially lengthwise of the apparatus, and a drillin tool carried by the forward extremity of sai boom.

8. In a drillin apparatus, a wheeled support, a housing w iolly supported thereby and pivotally mounted thereon for tilting movement relative thereto about a transverse axis, a standard rotatably mounted on said housing, a boom journaled at its rear end on said standard for rotation relative thereto about its longitudinal axis and extending forwardly in advance of said support substantially lengthwise of the apparatus, and a drillin tool carried by said boom at the forward extremity thereof.

9. In a drilling apparatus, a wheeled support, a standard pivotally mounted thereon to rock relative thereto on a transverse axis, a motor carried by the upper end of said standard, a boom mounted at its rear end on and solely supported by said standard and rigidly held against swinging movement relative thereto, said boom extending forwardly in advance of said support substantially lengthwise of the apparatus, a drilling tool carried by said boom at the forward extremity thereof, devices on said sup ort and stand- Aand for holding the same in its di'erent adjusted positions, and drivin connections be tween said motor and said rilling tool.

10. In a drilling apparatus, a wheeled support, a standard pivotally mounted thereon to rock relative thereto on a transverse axis, a motor carried at the upper end of said standard, a boom mounted on said standard, a drilling tool carried by said boom, and driving connections between said motor and drillin tool and the wheels of said support.

11. n a drilling apparatus, a wheeled support, a tubular standard pivotally mounted thereon to rock on a transverse axis, a motor carried at the upper end of said standard, a boom mounted on said standard, a drilling tool carried by said boom, and driving connections between said motor and drillin tool and the wheels of said su port, the driving connections between said) motor and the wheels including a transmission element extendin throu h said standard.

12. n a dri ling apparatus, a wheeled support, a housing pivotally mounted on said support to rock relative thereto on a transverse axis, a standard mounted on said housing for rotation about its longitudinal axis, a frame carried at the upper end of said standard, a motor carried by said frame, a boom mounted on said frame and arranged in axial alinement with the motor, and a drillin tool carried by said boom and driven by said motor.

13. In a drilling apparatus, a wheeled support, a housing supported thereon for tilting movement about a transverse axis, u an upwardly extending supporting column rotatably!v mounted on said housing for rotation about its longitudinal axis, a frame supported at the upper end of said column, al motor carried by said frame, a boom rotatably mounted on said frame about its longitudinal axis, the axis of said boom coinciding with the motor axis, a drillin tool pivotally mounted on said boom, an driving connections between the motor and said drilling tool.

14. In a drilling apparatus, a Wheeled support, a housing supported thereon for tilting movement about a transverse axis, an upwardly extending supporting column rotatably mounted on said housing for rotation about its longitudinal axis, a frame supported at the upper end of said column, a motor carried by said frame, a boom rotatably mounted on said frame about its longitudinal axis, the axis of said boom coinciding with the motor axis, a drilling tool pivotally mounted on said boom, and driving connections between the motor and said drilling tool and the wheels of said su port.

l5. n a drilling apparatus, a wheeled support, a housing supported thereon for tilting movement about a transverse axis, an upwardl extending tubular supporting column rotata ly mounted on said housin for rotation about its longitudinal axis, a grama supported at the upper end of said column, a motor carried by said frame, a boom rotatably mounted on said frame about its longitudinal axis, the axis of said boom coinciding with the motor axis, a drillin tool pivotally mounted on said boom, and rivin connections between the motor and saidg drilling tool and the wheels of said support, the driving connections between said motor and the wheels including a transmission elements extending through said column.

16. In a drilling apparatus, a wheeled support, an upstandin column mounted on said support to rock re ative thereto on a transverse axis, a frame supported at the upper end of said column, a motor carried by said frame, a drilling tool supported by said frame, and drivin connections between said motor and the drllling tool and the wheels of said suport.

p 17. In a drilling apparatus, a wheeled support, a housing ivotally mounted thereon to rock relative t ereto on a transverse axis, an upstanding column supported on said housing for rotation relative thereto about its longitudinal axis, a motor supported by said column, a drilling tool supported by said column, and driving connections between said motor and said drilling tool and the wheels of said support.

18. In a drilling apparatus, a wheeled support, a housing supported thereon for pivotal movement about a transverse horizontal axis, an upstanding column supported on the housing for rotation about its longitudinal axis a casing carried at the upper end of sai column, a motor secured to said casing, a forwardly projecting supporting arm rotatably mounted on said casing about its longitudinal axis, the axes of said supporting arm and motor being arranged in alinement, mechanism for rotating said supporting arm relative to said casing, a drilling tool pivot ally mounted on the outer extremity of said supporting arm, driving connections between sald motor and said drilling tool, and driving connections between said motor and the wheels of said support.

19. In a drilling apparatus, a wheeled support, a housing supported thereon for tilting movement about a transverse horizontal axis, an upstanding column mounted on said housing for rotation about its longitudinal axis, a casing supported on the upper end of said column, said casing having a rearwardly projecting portion, a motor carried by said rearwardly projecting portion1 a forwardly projecting supporting arm rotatably mounted on said casing for rotation about its longitudinal axis, said arm being arranged in axial alinement with said motor, mechanism for rotating said arm relative to said 25 eled on casing, a drilling tool pivotally mounted on the outer extremity of said arm driving connections between said motor and said drillin tool, and drivin connections between sai motor and the W eels of said su port.

20. In a drilling apparatus, a W eeled support, a frame whollyl supported thereon and adjustable relative t ereto about a transverse axis, a boom adjustably mounted on said frame, a drilling tool carried at the outer end of said boom, mechanism for driving said drilling tool including a driving motor at the end of said boom remote from said tool and supported by said frame for adjustment therewith relative to said support, and mechanism driven by said motor operative irrespective of the position of said boom relative to said support for driving the wheels of said sup ort.

21. In a rilling apparatus, a wheeled support, a frame mounted thereon for rotation relative thereto about a vertical axis, a boom adj ustably mounted on said frame for movement relative thereto, a drilling tool swivthe outer extremity of said boom, a motor at the end of said boom remote from said drillingr tool and supported by said frame for rotation therewith relative to said support, driving connections between said motor and said drilling tool, and mechanism driven by said motor operative irrespective of the position of said boom relative to said support for driving the support wheels.

22. In a drilling apparatus, a wheeled support, a frame mounted thereon for tilting movement relative thereto about a transverse axis, a column rotatably mounted on said frame for rotation relative thereto about its longitudinal axis, a motor carried by said column, a boom carried by said column and adjustable relative thereto, a drilling tool swiveled on the outer extremity of said boom, and driving connections between said motor and said drilling tool.

23. In a drilling apparatus, a wheeled support, a frame mounted thereon for tilting movement relative thereto about a transverse axis, a column rotatably mounted on said frame for rotation relative thereto about its longitudinal axis, a motor carried by said column, a boom carried by said column and adjustable relative thereto, a drilling tool swiveled on the outer extremity of said boom, driving connections between said motor and 1 said drilling tool, and driving connections between said motor and the wheels of said support.

24. In a drilling apparatus, a wheeled support, a frame mounted thereon for rotation about a vertical axis, a boom carried by said frame and adjustable angularly relative to said support, said boom being rotatably mounted on said frame for rotation relative thereto about its longitudinal axis, a drilling tool adjustably mounted on the outer extremity of said boom, a motor on said support and mounted on said frame for rotation therewith relative to said support, drivin connections between said motor and sai drilling tool, and constantly operative driving connections between said motor and the wheels of said support.

25. In a drilling apparatus, a wheeled support, a frame mounted thereon for rotation about a vertical axis, a boom carried by said frame and rotatable relative thereto about its longitudinal axis, a drilling tool adjustably mounted on the outer extremity of said boom a motor carried b said rotatable frame an adjustable therewith relative to said support, driving connections between said motor and said drilling tool, and constantly operative driving connections between said motor and the wheels of said support.

26. In a drilling apparatus, a wheeled su port, a frame thereon, a boom pivotal y mounted between its ends on said frame, a motor carried by said boom at one end thereof and adjustable therewith, a drilling tool carried at the other end of said boom, driving connections between said motor and said tool, and driving connections between said motor and the support wheels including a transmission element having its axis coincident with the pivotal axis of said boom.

27. In a drilling apparatus, a wheeled support, a frame thereon, a boom pivotally mounted between its ends on said frame for tilting movement in different planes about a plurality of axes, a motor carried by said boom at one end thereof and adjustable therewith, a drilling tool carried at the other end of said boom, driving connections between said motor and said tool, and driving connections between said motor and the support wheels including transmission elements having their axes coincident with the pivotal axes of said boom.

28. In a drilling apparatus, a portable wheeled support, an upstanding frame on said support, a boom pivotally mounted intermediate its ends on said upstanding frame for swinging movement in intersecting planes, a motor carried at one end of said boom and adjustable therewith during swinging of the latter, a drilling tool carried at the other end of said boom, driving connections between said motor and said drilling tool, and driving connections between said motor and the support wheels operative to ropel said support irrespective of the adjusted position of said boom relative thereto.

29. In a drilling apparatus, a wheeled support, a frame mounted thereon, a boom pivotally mounted intermediate its ends on said frame, a motor carried at one end of said boom and adjustable therewith, a drilling tool carried at the other end of said boom, driving connections between said motor and said drilling tool, and driving connections between said motor and the support wheels for propelling the apparatus irrespective of the adjusted position of said boom relative to said sup ort.

30. In a rilling apparatus, a wheeled support, a column pivotally connected at its lower end to said support for swinging movement relative to said support about a transverse axis, a frame carried at the upper end of said column, a motor carried by said frame, a boom adjustably mounted at its inner end on said frame, a drillin tool swiveled on the outer extremity of said oom, and drivin connections between said motor i, and said drilling tool.

31. In a drilling apparatus, a wheeled support, a frame mounted thereon and tiltable relative thereto about a transverse horizontal axis, mechanism for tilting said frame relative to said support, a standard rotatably mounted on said tiltable frame, means for securing said standard to said tiltable frame, a frame carried on the upper end of said standard and carrying a motor, a boom rotatably mounted on said last mentioned frame about its longitudinal axis, mechanism for rotating said tboom relative to said frame, a drillin tool swiveled on.the outer extremity of sai Y boom, and driving connections be- C tween said motor and said drilling tool.

32. In a drilling apparatus, a wheeled support, a frame mounted thereon and tiltable relative thereto about a transverse horizontal axis, mechanism for tilting said frame relative to said support, a standard rotatably mounted on said tiltable frame, means for securing said standard to said tiltable frame, a frame carried on the upper end of said standard and carrying a motor, a boom rotatably 4, mounted on said last mentioned frame about its longitudinal axis, mechanism for rotating said boom relative to said frame, a drilling tool swiveled on the outer extremity of said boom, driving connections between said motor and said drilling tool, and driving connections between said motor and the wheels of said support operative to propel said support in any adjusted position of said standard relative thereto.

33. In a drilling apparatus, a wheeled support, a frame mounted thereon and Wholly supplorted thereby and tiltable relative thereto a out a transverse horizontal axis, mechanism for tilting said frame relative to said support, a second frame mounted on said tiltable frame for rotation about a vertical axis, means for securing said second frame to said tiltable frame, a boom mounted on said second frame, and a drilling tool adjustably mounted on the outer extremity of said boom.

34. In a drilling apparatus, a wheeled support, a standard mounted thereon for tilting movement relative thereto about a horizontal axis extending transversely of said support,

' a frame supported by said standard, a motor carried by said frame, a boom mounted at its rear end on said frame andextending forwardly in advance of said support substantially lengthwise of the apparatus, a drilling tool carried by said boom at the forward extremity thereof and mounted thereon for adjustment bodily about the boom axis into different parallel positions, and driving connecltions between said motor and said drilling too 35. In a. drilling apparatus, a wheeled support, a standard mounted thereon for tiltinv movement relative thereto about a horizontal axis extending transversely of said support, a frame supported by said standard, a motor carried by said frame, a boom mounted at its rear end on said frame and extendin forwardly in advance of said support su stantially lengthwise of the apparatus, a drilling tool carried by said boom at the forward extremity thereof and mounted thereon for adjustment bodil about the boom axis into different paral el positions and for adjustment about an axis perpendicular to the boom axis, and driving connections between said motor and said drilling tool.

36. In a drilling apparatus, a support, a frame mounted thereon for tilting movement relative thereto about a transverse axis, a

Aboom mounted at its rear end on and solely supported by said frame and rigidl held against swinging movement relative t ereto, said boom extending forwardly in advance of said support, a drilling tool mounted on the outer extremity of said boom, a rotary motor supported by said frame and having its axis alined with the boom axis, devices on said support and frame for swinging the latter about said axis for holding the same in its different tilted positions, and driving connectiorlis between said motor and said drilling too 37. In a drilling apparatus, a support, a frame mounted thereon for tilting movement relative thereto about a transverse axis, a boom mounted at its rear end on said frame for rotation about its longitudinal axis and extending forwardly in advance of said support, a rillin tool mounted on the outer extremity of said boom and adjustable therewith about the boom axis, a rotary motor supported by said frame and having its axis alined with the boom axis, and driving connections between said motor and drilling tool operative to drive the latter irrespective of the position thereof about said boom axis.

38. In a drilling apparatus, a portable support, an elongated supporting structure wholly supported by and adjustably mounted on said support and extending a substantial distance in advance of said support, a drilling tool adj ustably mounted on the outer extremity of said supporting structure, said supporting structure being adjustable to position said drilling tool in a plurality of relalCS Til

'tively high and relatively low parallel planes and Into positions at eit er side of said support, a motor, mechanism driven by said motor for driving the drilling tool, and power supply apparatus mounted on said supporting structure and including a power conductor reel driven by said motor. Y

39. Inadrillin apparatus,a ortable'support, a frame who ly supported y and pivotally mounted on said support to rock relative thereto on a transverse axis, a second frame mounted on said tiltable frame for rotation relative thereto about an axis perpendicular to said first mentioned axis, an elongated supporting structure adJustably mounted on said second frame and extendmg a substantial distance in advance of said support, a drillingr tool adjustably mounted on the outer extremity of said supporting structure, said su orting structure and frames being adjustalbe to position said drillingr tool in a plurality of relatively high and relative- 1y low parallel planes and into positions at either side of said support, a motor, and mechanism driven by said motor for driving said drilling tool.

40. In a drilling apparatus, a portable support, a frame wholly supported by and piv ot' ally mounted on said support to rock relative thereto on a transverse axis, a second frame mounted on said tiltable frame for rotation relative thereto about an axis perpendicular to said first mentioned axis, an elongated supdporting structure adjustably mounted on sai second frame and extending a substantial distance in advance of said support, a drilling tool adjustably mounted on the outer extremity of said supporting.;r structure, said supporting structure and frames being adjustable to position said drilling tool in a lurality of relatively high and relatively flaw parallel planes and into positions at either side of said support, a motor, mechanism driven by said motor for driving said drilling tool, and mechanism driven by said motor for propelling the apparatus.

41. In a drilling apparatus, a support, a frame mounted thereon for tilting movement about a transverse axis, a swivel frame mounted on said tiltable frame for rotation about a vertical axis, a boom mounted at its rear end on said swivel frame and extending forwardly in advance of said support, a drilling tool mounted on the outer extremity of said boom, a rotary motor supported by said swivel frame and having its axis alined with the boom axis, and driving connections between said motor and said drilling tool.

42. In a drilling apparatus, a support, a frame mounted thereon for tilting movement about a transverse axis, a swivel frame mounted on said tiltable frame for rotation about a vertical axis, a boom mounted at its rear end on said swivel frame for rotation about its longitudinal axis and extending forwardly in advance of saida support, a drilling tool mounted on the outer extremity of said boom and adjustable therewith about the boom axis, a rotar motor supported by said swivel frame, and aving its axis alined with the boom axis and driving connections between said motor and said drilling tool o erative to drive the latter irrespective of t e position thereof about said boom axis.

43. In a drilling apparatus, a support, a frame mounted thereon for tilting movement about a transverse axis, a swivel frame mounted on said tiltable frame for rotation about a vertical axis a boom mounted at its rear end on said tiltable frame and extending forwardly in advance of said support, a drilling tool mounted on the outer extremity of said boom, a rotary motor supported by said tiltable frame and having its axis alined with the boom axis, driving connections between said motor and said drilling tool, and mechanism driven by said motor propelling the apparatus.

44. In a drilling apparatus, a support, a frame mounted thereon for tilting movement about a transverse axis, a swivel frame mounted on said tiltable frame for rotation about a vertical axis, a boom mounted at its rear end on said tiltable frame for rotation about its longitudinal axis and extending forwardly in advance of said support. a drilling tool mounted on the outer extremity of said boom and adjustable therewith about the boom axis, a rotary motor supported by said tiltable frame and having its axis alined with the boom axis, driving connections between said motor and said drilling tool operative to drive the latter irrespective ofthe position thereof about said boom axis, and mechanism driven by said motor for propelling the apparatus.

45. In a drilling apparatus, a wheeled support, an upright standard supported thereby and tiltable relative thereto about a horizontal axis extending transversely of said support and arranged adjacent the lower end of said standard, a boom adjustably mounted at its rear end on said standard and extending forwardly in advance of said support substantially lengthwise of the apparatus, and a drilling tool carried by said boom at the forward extremity thereof and adjustabh` angularly relative to said boom to drill holes in relatively inclined planes.

46. In a drilling apparatus, a wheeled support, a standard mounted thereon for tilting movement relative thereto about a horizontal axis extending transversely of said support, a frame supported by said standard, a motor carried by said frame, a boom mounted at its rear end on said frame and extending forwardly in advance of said support substantially14 lengthwise of the apparatus, a. drilling tool carried by said boom at the forward extremity thereof and adjustable angularly relative to said boom to drill holes in relatively inclined lanes, and drivin connections between sai motor and said drilling tool.

47. In a drilling apparatus, a wheeled support, a standard pivotally mounted thereon to rock relative thereto on a transverse axis, a motor carried by the upper end of said standard, a boom mounted at its rear end on said standard and extending forwardly in advance of said support substantially lengthwise of the apparatus, a drilling tool carried by said boom at the forward extremity thereof and adjustable angularly relative to said boom to drill holes in relatively inclined planes, and drivin connections between said motor and said drilling tool.

48. In a drilling apparatus, a support, a frame mounted thereon for tilting movement relative thereto about a transverse axis, a boom mounted at its rear end on said frame and extending forwardly in advance of said support, a drillin tool mounted on the outer extremity of sai boom and adjustable angularly relative thereto to drill holes in relatively inclined planes, a rotary motor supported b said frame and having its axis alined wlth the boom axis, and driving connecltions between said motor and said drilling too In testimony whereof I aix m si ature.

MORRIS P. O S.

CERTIFICATE OF CORRECTION.

Patent No. 1,866,932. July l2, 1932.

MORRIS P. HOLMES.

lt is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page 3, line 54, after "drum" insert 96; page 6, line 78, claim l5, for "elements" read element; and page 9, line 87, claim 43, before "propelling" insert the word for; and that the said Letters Patent should be read with these corrections therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 30th day of October, A. D. 1934.

Leslie Frazer (Seal) Acting Commissioner of Patents.

relative to said boom to drill holes in relatively inclined lanes, and drivin connections between sai motor and said drilling tool.

47. In a drilling apparatus, a wheeled support, a standard pivotally mounted thereon to rock relative thereto on a transverse axis, a motor carried by the upper end of said standard, a boom mounted at its rear end on said standard and extending forwardly in advance of said support substantially lengthwise of the apparatus, a drilling tool carried by said boom at the forward extremity thereof and adjustable angularly relative to said boom to drill holes in relatively inclined planes, and drivin connections between said motor and said drilling tool.

48. In a drilling apparatus, a support, a frame mounted thereon for tilting movement relative thereto about a transverse axis, a boom mounted at its rear end on said frame and extending forwardly in advance of said support, a drillin tool mounted on the outer extremity of sai boom and adjustable angularly relative thereto to drill holes in relatively inclined planes, a rotary motor supported b said frame and having its axis alined wlth the boom axis, and driving connecltions between said motor and said drilling too In testimony whereof I aix m si ature.

MORRIS P. O S.

CERTIFICATE OF CORRECTION.

Patent No. 1,866,932. July l2, 1932.

MORRIS P. HOLMES.

lt is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page 3, line 54, after "drum" insert 96; page 6, line 78, claim l5, for "elements" read element; and page 9, line 87, claim 43, before "propelling" insert the word for; and that the said Letters Patent should be read with these corrections therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 30th day of October, A. D. 1934.

Leslie Frazer (Seal) Acting Commissioner of Patents. 

